Which of the following is an s-block element? a. Ca b. Pd c. U d. Br e. V Arrang

Question

Which of the following is an s-block element? a. Ca b. Pd c. U d. Br e. V Arrange the following in order of decreasing radii: K, Mg, Mg^2+, Na. a. Mg^2+ > Mg > Na > K b. K > Mg > Na > Mg^2+ c. K > Na > Mg^2+ > Mg d. K > Na > Mg > Mg^2+ e. Na > K > Mg > Mg^2+ How much heat is lost from a 25.0-g block of copper when it cools by 7.1 degree C? The specific heat of copper is 0.38 J/g degree C. a. 4.3 kJ b. 467 J c. 1.3 J d. 85 J e. 67 J What is the final temperature of a 40-g sample of ethanol (C_2H_5OH) at 25.0 degree C that absorbs of J of heat? The specific heat of ethanol is 2.42 J/g degree C. a. 25.9 degree C b. 30.1 degree C c. 28.7 degree C d. 25.3 degree C e. 21.3 degree C

Explanation / Answer

22) Element where the last electron enters into s- orbital are classified under s-block element

out of the given elements, in Ca, the last electron enters s- orbital(i.e.- 4s2) and hence is an s-block element.

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